IGM may refer to:

  • Initiative on Global Markets, at the University of Chicago Booth School of Business
  • IG Metall, German metalworkers' union
  • IGM Financial, Canada
  • Institut Gaspard Monge, at the University of Marne la Vallée
  • International Grandmaster, a chess title
  • Intergalactic medium
  • Kingman Airport (Arizona) (IATA Code: IGM)
  • Instituto Geográfico Militar (Chile), Chilean national mapping agency
  • Istituto Geografico Militare, Italian national mapping agency
  • Intersex genital mutilation

Medicine

  • Immunoglobulin M, an antibody